Listen, man. You were on the right track. Two things you should take note of:

1. You say this is a LAST chance. But earlier you already said you were through with her. If you give in now, you're going to keep giving in. Guaranteed. This will NOT end up being the LAST time.

2. If on the off chance you two get back together, she's going to treat you just as poorly as she had in the past.

Seriously, drop that ho! You're still not over her. I'm not saying it's ever easy, but she's moved on, and you should too. It's not healthy to be fixated on a girl like that. How many other girls have you had since you two broke up?

_________________
Jazzy Jeff: "My love for you is like a river,
Like a summer breeze that makes my soul shiver,
One look from you is more precious than gold,
Let's grab some BBQ and go get busy!"

rar

Jesus I made a fucking account just so I could slap you into shape.

You need to quit talking like a fucking wimp.
Seriously.
"Oh yay I'm so much better without her oh goodie"
"Jk guys I'm asking her out in a couple days"

You come here, expecting advice, and you just blow it off like you know your shit.

DO NOT take her to that concert. If anything invite another girl friend and take a pic with you two, post it on facebook. Again, stay with the NO CONTACT. I know you haven't been following through with no contact, you can tell by your posts, but seriously, you need to fucking stop.

Or ignore our advice and learn the hard way.
I've made the same mistake you're about to make, so save yourself the useless tears and just move the fuck on.